Amidst allegations he is the father of a California woman's baby, Canadian pop star Justin Bieber says he's going to "focus on what is real."

In a message to his nearly 14 million followers on the social media service Twitter Tuesday afternoon, Bieber wrote that he's "going to ignore the rumors...and focus on what is real. an opportunity to help by doing what i love. Judge me on the music! Love yall!"

A publicist for Bieber also commented on the paternity suit filed by 20-year-old Mariah Yeater, saying the singer will pursue "all available legal remedies" to fight allegations that he fathered the woman's baby.

The Canadian Press received a statement from publicist Melissa Victor on Wednesday outlining the stance of Bieber's representatives on the pending paternity lawsuit by Mariah Yeater.

"While we haven't yet seen the lawsuit, it's sad that someone would fabricate malicious, defamatory and demonstrably false claims," Victor said in the statement.

"We will vigorously pursue all available legal remedies to defend and protect Justin against these allegations."

Yeater alleges that she had sex with Bieber backstage at one of his concerts last year, and gave birth to a baby in July as a result of the encounter.

Yeater's attorneys told the Associated Press that their client isn't seeking a large amount of money from the teen heartthrob.

She is "pursuing a modest and rightful claim," lawyers Lance Rogers and Matthew Pare said in a statement. "There is credible evidence that Justin Bieber is in fact the father of her baby."

The lawyers also noted that Bieber hasn't denied that he had unprotected sex with Yeater.

"We call upon Justin Bieber and his attorneys to reach out to resolve this issue in a reasonable manner," they said.

Her paternity suit, filed on Monday, is the cover story of the forthcoming issue of Star magazine, which features a photo of Yeater and her baby.

The Star website is promoting the story about Yeater, but visitors cannot read its content on the web.

Instead, site visitors are being directed to Radar Online, a gossip website that has a report on Yeater's lawsuit.

The Radar Online story says Yeater claims to have had unprotected sex with Bieber after one of his concerts at Los Angeles' Staples Center in late October, 2010.

With files from The Canadian Press and Associated Press